Window.



H. J. DAVISON.

WINDOW.

' APPLICATION FILED DEG. 18.1909.

Patented Feb. 8, 1910.

' dow showing the invention.

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HENRY JOGELYN DAV-ISON, or Moo'nrrnnn, BEXHILL, ENGLAND.

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Specification of Letters Patent.

Applicationlfited December 18, 1909. Serial No. 533,869.

- field, Bexhill-on-Se'a, in the county of Sussex, England, haveinvented new and useful Improvements in and Relating to W'indows,

ofavhiclkthefollowing is a specification.

The purpose of'this invention is to provide a locking device for windowsin which two sashes are hinged together along a vertial or horizontalline and their remote edges are uided in a frame.

- It is a urt-her object of the invention to insure thoroughlocking ofthe window both 1 at the top and bottom.

To this end the invention comprises a' locking device'lying in the planeof thewindow sashes and adapted to press the sashes against one of themembers of the frame. In the accompanying drawings Figure 1 is a generalperspective view of a window of the type for which the invention isdesigned, and Fig. 2 is a cross section of such a win- Fig. 3 is a crosssection of the upper art of the window showing a slightly mo ified formof the invention. 7

From' Fig. 1 it will be seen thatthe window frame comprises twohorizontal members 1 and '2 and two vertical members 3 and 4. Thewindow'itself comprises twoglazed sashes 5 and 6 hinged together wherethe meet at 7. The remote edges of the sas es have projecting pins 8both at the top and bottom, and these enter holes in sliding members 9and 10 respectively. The sliding members 9 at the bottom are simplymetal blocks sliding in a metallic channel 11 suitably secured in thebottom member 1 of the window frame. The slides 10 at the top arerecessed on their upper surface to receive a bar 12 of cam sectionsecured in suitable bearings, not shown, at the end of the window. Thisbar may be rotated by any suitable means, such as for example a handlever, in the manner shown in my Patent No. 937,580, granted on thenineteenth dayof October, 1909. In the construction shown the lockin bar12 is cylindrical in its upper half, w ile the lower half is reducedrelatively'to the cylindrical surface, but other forms of constructionare admissible. It will be understood that when the bar is turned itsupper surface continues to I bear against the channel member 13 in whichthe blocks 10 slide but the part of least radius being no longerpresented to the slides 10, this will be ressed downward. This pressure,which su ces through friction, vto further prevent movement of theblocks 10 on the bar 12 is also transmitted through the window sashes tothe blocks 9 at the bottom, and therefore prevents movement of theseblocks in the channel 11. Thus the window is firmly locked both at thetop and the bottom.

The channel piece 13 may be provided with a trough shaped projectingpart 14 as indicated in Fig. 3. This will fit the cylindrical part ofthe bar 0 and thus give it a greater bearing surface.

It will be obvious that the locking device can be arranged equally wellatthe bottom v of the window.

What I claim is z- 1. In a window, the combination of two sashes andmeans hinging them together, a window frame, guiding grooves in theplane ofsaid frame in opposite members thereof, sliding pieces pivotedto the sashes and mov ing in the grooves, and a locking device extendingacross the frame in one of said grooves arranged upon'rotation to pressthe sashes against the opposite member of the frame.

2. In a window, the combination of two sashes and means hinging them toether, a window frame, guiding grooves in t e plane of said frame inopposite members thereof, sliding pieces pivoted to the sashes andmoving in the grooves, and a locking deviceextending across the windowframe and rotatable on its axis to exert pressure in the plane of saidframe. I 3. In a window, the combination of two sashes and means hingingthem to ether, a window frame, guiding grooves in t e plane of saidframe in opposite members thereof,

Patented Feb. 8, 1910.

tion extending along one of the grooves, a non circular section extendinalong the back bar. adjacent to said bar of non circular groove in theupper member etween the 15 i sliding pieces therein and the backthereof,

section adapted to support said bar throughand means for rotatmg saidbar so as to exert out its length and means for rotating said bar ofnon-circular section, so as to exert pressure on the sliding pieces inthe plane of pressure on the sliding pieces in the plane of the frame.

the frame. In testimony whereof I have signed my 20 5. In a window, thecombination of two name to this specification in the presence of sashesand means hinging them together, a two subscribin witnesses.

window frame, guiding grooves in the plane HENR J OCELYN DAVISON.

of said frame in the top and bottom mem- Witnesses:

bers thereof, sliding pieces pivoted to the LEONARD E. HAYNES,

sashes and moving in said gr0oves, a bar of H. D. J AMESON.

